Gpio Port Output Type Register (Gpiox_Otyper); (X = A; Gpio Port Output Speed Register (Gpiox_Ospeedr); Gpio Port Pull-Up/Pull-Down Register (Gpiox_Pupdr) - ST STM32F40 Series Reference Manual

General-purpose I/Os (GPIO)
7.4.2

GPIO port output type register (GPIOx_OTYPER)

(x = A..I)
Address offset: 0x04
Reset value: 0x0000 0000
31 30 29 28
15 14 13 12
OT15 OT14 OT13 OT12
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Bits 31:16 Reserved, must be kept at reset value.
Bits 15:0 OTy[1:0]: Port x configuration bits (y = 0..15)
7.4.3

GPIO port output speed register (GPIOx_OSPEEDR)

(x = A..I/)
Address offset: 0x08
Reset values:
● 0x0000 00C0 for port B
●
0x0000 0000 for other ports
31 30 29
OSPEEDR15[1:0] OSPEEDR14[1:0] OSPEEDR13[1:0] OSPEEDR12[1:0] OSPEEDR11[1:0] OSPEEDR10[1:0] OSPEEDR9[1:0] OSPEEDR8[1:0]
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15 14 13
OSPEEDR7[1:0] OSPEEDR6[1:0] OSPEEDR5[1:0] OSPEEDR4[1:0]
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Bits 2y:2y+1 OSPEEDRy[1:0]: Port x configuration bits (y = 0..15)
7.4.4

GPIO port pull-up/pull-down register (GPIOx_PUPDR)

(x = A..I/)
Address offset: 0x0C
199/1422
27 26 25
11 10 9
OT11 OT10 OT9
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These bits are written by software to configure the output type of the I/O port.
0: Output push-pull (reset state)
1: Output open-drain
28 27 26 25
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12 11 10 9
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These bits are written by software to configure the I/O output speed.
00: 2 MHz Low speed
01: 25 MHz Medium speed
10: 50 MHz Fast speed
11: 100 MHz High speed on 30 pF (80 MHz Output max speed on 15 pF)
Doc ID 018909 Rev 4
24 23 22 21
Reserved
8 7 6 5
OT8 OT7 OT6 OT5
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24 23 22
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8 7 6
OSPEEDR3[1:0] OSPEEDR2[1:0] OSPEEDR1[1:0] OSPEEDR0[1:0]
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20 19 18
4 3 2
OT4 OT3 OT2
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21 20 19 18
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5 4 3 2
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RM0090
17 16
1 0
OT1 OT0
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17 16
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1 0
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